/Engine/Source/Runtime/UMG/Public/Blueprint/WidgetLayoutLibrary.h
Gets the geometry of the widget holding all widgets added to the "Player Screen". You can use this geometry to convert between absolute and local space of widgets held on this widget.
static [FGeometry](API\Runtime\SlateCore\Layout\FGeometry) GetPlayerScreenWidgetGeometry ( [APlayerController](API\Runtime\Engine\GameFramework\APlayerController) * PlayerController )